;; Posterize effect - reduce color levels for poster-like look
;; Usage: python3 plan.py effects/posterize.sexp -p levels=6 | python3 execute.py - -d . -o output.mp4
;;
;; Parameters:
;;   levels: number of color levels per channel (2 to 32, default: 6)
;;           lower = more posterized, higher = more gradual

(recipe "posterize"
  :version "1.0"
  :encoding (:codec "libx264" :crf 20 :preset "medium" :audio-codec "aac" :fps 30)

  (effect posterize :path "sexp_effects/effects/posterize.sexp")

  ;; Default parameter (overridden by -p levels=N)
  (def levels 6)

  (def video (source :path "monday.webm"))
  (def clip (-> video (segment :start 0 :duration 10)))
  (def result (-> clip (effect posterize :levels levels)))
  result)